Ever-Power has been developing and manufacturing reliable, high performance gearboxes for over twenty years. RW Series miniature correct angle gearboxes offer high torque ideals with very low backlash in extremely compact frames. Three equipment ratios are available to meet up the requirements of your specific application.
Order the Ever-Power RW Series worm gear box assembly you will need, request a quote, or contact us for more information.
Worm Wheel Miniature Gearboxes
Our RW series miniature worm gear box assembly could be small, but it’s tough enough to handle demanding power transfer applications. Constructed with machined aluminium housings and hardened steel input and result gears, they’ll deliver many years of reliable performance.
Available in three standard result ratios and with two result shaft diameter options, it’s easy to find the Ever-Power correct miniature gearbox to your requirements. Each RW model worm gear container assembly provides proportionally high torque ideals (1.4 NM at 3,000 RPM) with suprisingly low backlash (optimum 2° backlash).
For full specifications and Dimensional Parametric Search, see individual product listings.
The Ever-Power Advantage
High efficiency miniature correct angle gearbox (up to 90% at 1,000 RPM)
Three gear ratios available: 5:1, 10:1, and 20:1
Extremely compact footprint: 1.5” x 1.5” x 1.08”
12.5 inch-lbs. output torque
Very low backlash (2° backlash optimum)
90° output angle
Maximum input speed: 3,000 RPM
Machined aluminum housing with hardened metal gears and oil-impregnated bronze bearings
Permanently lubricated
Made in the China
Mechanical drives take supplied torque and may increase or reduce that torque predicated on application. Also acceleration is increased or reduced in proportion index G – Equipment BOXES – on blue – smallto the speed decrease ratio. Ever-Power has a full type of gearboxes and speed reducers, and the components needed to build them, in an array of standard ratios and shaft choices as well as custom designs.
Helical, bevel, and miter gear boxes offer the options of rate reducers or rate increasers, and could be driven in either path. All Ever-Power worm equipment speed reducers and right angle drives are manufactured for high performance in a large spectral range of applications. Typically worm equipment boxes aren’t used as swiftness increasers. The situations are molded glass-filled materials making them extremely durable and resistant to corrosive conditions. They are offered in a wide variety of ratios and are equipped with right hands or left hands worm gears. The result shafts could be solid or hollow, and load capacity is unaffected by direction and rotation.
Worm gear velocity reducers are comprised of a screw (the worm) that drives a wheel (helical gear) or one enveloping wheel and so are used in mechanical applications which range from conveyors to physical exercise devices to robots.
Geneva mechanisms and assemblies are typically used to transform continuous rotary motion into intermittent rotary movement. The rotating drive wheel includes a pin that gets to into a slot of the powered 
wheel advancing it by one step and a blocking disc that locks the driven wheel constantly in place between steps.
Compact design
Compact design is one of the key phrases of the typical gearboxes of the BJ-Series. Further optimisation may be accomplished by using adapted gearboxes or unique gearboxes.
Low noise
Our worm gearboxes and actuators are really quiet. This is because of the very smooth running of the worm gear combined with the utilization of cast iron and high precision on element manufacturing and assembly. In connection with our precision gearboxes, we take extra care of any sound that can be interpreted as a murmur from the apparatus. Therefore the general noise level of our gearbox is reduced to an absolute minimum.
Angle gearboxes
On the worm gearbox the input shaft and output shaft are perpendicular to one another. This frequently proves to be a decisive advantage making the incorporation of the gearbox significantly simpler and more compact.The worm gearbox is an angle gear. This is an advantage for incorporation into constructions.
Solid bearings in solid housing
The output shaft of the BJ worm gearbox is very firmly embedded in the gear house and is ideal for direct suspension for wheels, movable arms and other areas rather than needing to create a separate suspension.
Self locking
For larger equipment ratios,EP-Gear’s worm gearboxes provides a self-locking impact, which in many situations can be used as brake or as extra security. Also spindle gearboxes with a trapezoidal spindle are self-locking, making them ideal for a wide variety of solutions.
Structural Features
The worm-gear reducer comprises of three main parts: housing, worm-gear and wheel.
The carcasses are made from GG-25 cast-iron, and are available for all types of gear-reducer. This make them perform efficiently under stressed circumstances, vibrations or any kind of setback that cannot be avoided during the assembly
The worm-gear is constructed of hardened and quench-hardened steel, with ground- on teeth sides, and the crowns made of DIN (GZ-CuSn 12 Ni2) centricast bronze, melted on steel. Because of the mechanical work of the two parts having high quality, excellent overall performance and low sound levels have been achived.
The output shaft is hollow, though it is possible to adapt a good shaft.
The oil seals manufactured from NITRILE BUTADIENE, according to DIN 3760, high quality bearings, an EPOXY- impregnated finish ( 2 components), and grey-coloured SINGLE LAYER ENAMEL finish ( 2 components) ( RAL 7672), supply the most competitive gear reducer on the market.
Size 63
In the size 62 of the MF series, worm-gear reducers, the output hollow shaft of diameter 30 has been included, that substitutes to the output hollow shaft with diameter 25, from size 62. This variant offers like reference size 63 and is born like response to the request of our costumers since, upon mounting higher bearings in the result, bears higher axial loads that its analogous one in the MF-62 series. The others of technical feature are identical to the its analogous in the size 62.
Assembly Position
In order to setup a gear reducer and to make it happen efficiently, the following instructions must be considered:
It should be fixed on a set surface to avoid either vibrations or tensions.
If undistributed loads or continued start-ups are foreseen, it is recommended to insert compensating couplings, connectors, torque limiters etc…
If the apparatus reducer needed to be painted, the essential oil seals must be covered to prevent them from drying and losing their seal.
The machine work of the fittings set up in the output shafts need an ISO H7 or h6 margin for the hollow shaft.
Backdriving
It is smart to pay attention to this factor when the apparatus reducer output shaft is driven instead of being a driver. Bearing in mind that one of the features of this worm-gear reducer may be the fact that cannot be axle-powered by the result shaft (irreversibility), it is almost impossible to meet total irreversibility conditions, due to external factors such as vibrations, etc. For this reason, when the application requires total irreversibility, it is advisable to make use of exterior brakes with enough capacity to avoid slipping.
It may be said that the conditions under which irreversibility can occur are as follows:
• Efficiency < 0,55 (find table of technical features).
Maintenance
This type of gear reducer is provided with a permanent lubrication, so it does not need any kind of maintenance.
Lubrication
The lubrication of this gear reducer type is continuous and comes as standard, with top quality refined oil which includes antirust and antiwear products with Fe, Cu and alloy protectors which has quality level CLP DIN 51517-3, FGZ level 12, AP GL-4, US 224, AGMA 250-04; because of this its maintenance is not needed.
High reduction gear
Worm and wheel gear pairings provide large swiftness decrease ratios with only 1 gear pairing in a more compact space in comparison to other styles of gears. You can expect up to maximum ratio of 100:1 with our products. Another advantage of the Worm and Wheel equipment pairings may be the low level sound they produce. Some drawbacks are the general low effectiveness and the fact that they generate heat.
Advantage of EP’s Worm Gears – “Frosty rolled Worm Gears”
1) The hardness of the helicoid surface has been achieved by work hardening when the chilly rolling was performed, providing Worm gears with better mechanical properties than machined worms because of truth that the metallic fibrous framework has not been cut.
2) The surface hardness after cool rolling is increased by 1.2 to at least one 1.3 times when compared with the hardness of the initial materials, and the hardness of the helicoid surface increases to around HB240 to 260.
3) Cool rolled worms are ideal for miniature equipment applications since this is often rotated smoothly without damaging the worm wheels made out of POM or other soft materials.
4) Because of the implementation of this cold rolling method, the helicoid surface area of EP-Worm (M0.5 to 2.0) comes out with a mirror like complete. Thus, EP-Precision Cold Rolled Worms provide a smooth procedure and long-term durability.
Worm gears are made of a worm and a gear (sometimes known as a worm wheel), with nonparallel, non-intersecting shafts oriented 90 degrees to one another. The worm is analogous to a screw with a V-type thread, and the gear is analogous to a spur gear. The worm is typically the traveling component, with the worm’s thread advancing the teeth of the gear.
Like a ball screw, the worm in a worm gear may have a single start or multiple starts – meaning that there are multiple threads, or helicies, on the worm. For a single-start worm, each complete turn (360 degrees) of the worm increases the equipment by one tooth. So a gear with 24 teeth will provide a gear reduction of 24:1. For a multi-begin worm, the apparatus reduction equals the amount of teeth on the apparatus, divided by the amount of begins on the worm. (This is not the same as most other types of gears, where the gear reduction is definitely a function of the diameters of both components.)
The meshing of the worm and the apparatus is an assortment of sliding and rolling actions, but sliding contact dominates at high reduction ratios. This sliding actions causes friction and heat, which limits the effectiveness of worm gears to 30 to 50 percent. In order to minimize friction (and therefore, temperature), the worm and equipment are made of dissimilar metals – for instance, the worm could be made of hardened steel and the apparatus manufactured from bronze or aluminum.
Although the sliding contact decreases efficiency, it provides very quiet operation. (The usage of dissimilar metals for the worm and gear also contributes to quiet procedure.) This makes worm gears suitable for use where sound should be minimized, such as for example in elevators. Furthermore, the use of a softer materials for the gear implies that it could absorb shock loads, like those experienced in heavy equipment or crushing machines.
The primary advantage of worm gears is their ability to provide high reduction ratios and correspondingly high torque multiplication. They can also be used as rate reducers in low- to moderate-quickness applications. And, because their reduction ratio is based on the number of gear teeth by itself, they are smaller sized than other types of gears. Like fine-pitch lead screws, worm gears are usually self-locking, which makes them perfect for hoisting and lifting applications.
Worms & Worm Gears
EP Gear’s worms and worm gears provide a highly effective answer for power tranny applications requiring high-ratio quickness reduction in a limited space using right angle (90°), non-intersecting shafts. When properly applied, worms and worm gears supply the smoothest, quietest kind of gearing.
Because the performance of a worm equipment drive depends upon the business lead angle and number of starts on the worm – and because increased efficiency is always a goal, the ratio should be kept only possible. To run correctly, worms and worm gears used together will need to have the same diametral pitch and threads.
Our complete line of worms and worm gears can be ordered through the EP Equipment Guaranteed Same Day Shipment System for the fastest delivery possible.
Product Features
90°, nonintersecting shaft applications answer highly specialized power transmitting needs.
Our worm gears provide smoothest, quietest form of gearing.
They provide high-ratio speed decrease in minimal spaces.
Their efficiency is easily increased by lowering ratios.
With some ratios, there is level of resistance to back driving.
Available from 48 DP to 3 DP
Stocked as single, dual and quad start configurations